An inventor of the first mechanical calculator

A. Charles Babbage चार्ल्स बैबेज

B. Blaise Pascal ब्लेस पास्कल

C. Rene Descartes रेने डेस्कर्टेस

D. Herman Hollerith हरमन होलेरिथ

Correct Answer is :

B. Blaise Pascal

Explanation

 Blaise Pascal invented a mechanical calculator with a sophisticated carry mechanism in 1642. After three years of effort and 50 prototypes he introduced his calculator to the public.